McGraw Hill Integrated II, 2012
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McGraw Hill Integrated II, 2012 View details
2. Solving Quadratic Equations by Graphing
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Exercise 41 Page 109

Use the fact that the zeros of a quadratic function are the x-intercepts of the graph.

Iku is correct.
Explanation: See solution.

Practice makes perfect
We know that the zeros of a quadratic function are the x-intercepts of the graph. We see that the graph does not intercept the x-axis, meaning that the equation has no real zeros.

Therefore, Iku's claim is correct, whereas Zachary's is incorrect. The y-intercept says nothing about the zeros of a parabola.